 Brake Bleeding - Caliper Bizzaro |
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| tomeric914 |
 Apr 27 2014, 10:38 AM
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One Lap of America in a 914!  Group: Members Posts: 1,268 Joined: 25-May 08 From: Syracuse, NY Member No.: 9,101 Region Association: North East States 
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Installed a complete new to me set of rebuilt calipers on a customer's 914. Master cylinder was recently replaced. Power bled the system with my Motiv bleeder set at 15 psi and couldn't get a good pedal. Did the traditional push/hold/release 2 person method and still couldn't get a good pedal.
If I wait about 10 seconds and then push the pedal hard, there is a hissing sound coming from the front. I thought it was the master cylinder at first but isolated it to the driver's front caliper. I've put close to 2 quarts through the system with absolutely no air. At my wits end, I put on the old caliper, bled it quick and the pedal is right where it needs to be. (IMG:style_emoticons/default/WTF.gif) I bled from the top bleeder, the bottom bleeder, as well as tried every trick I could think of. There are no leaks in the rebuilt caliper and yes it is a quality rebuild from PMB. I'll take apart the caliper and see what I find inside. Again, these are secondhand rebuilds so who knows what could be in there. If anyone has run across a similar to issue, let me know what you found! |
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| tomeric914 |
Apr 27 2014, 12:41 PM
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One Lap of America in a 914! Group: Members Posts: 1,268 Joined: 25-May 08 From: Syracuse, NY Member No.: 9,101 Region Association: North East States
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Found it. Blocked passage inside the caliper leading up to the top bleeder wouldn't allow the air out.
(IMG:style_emoticons/default/headbang.gif) |
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Posts in this topic
tomeric914 Brake Bleeding - Caliper Bizzaro Apr 27 2014, 10:38 AM
Mark Henry Did you try cracking each line connection and blee... Apr 27 2014, 10:44 AM
tomeric914
Did you try cracking each line connection and ble... Apr 27 2014, 10:46 AM Eric_Shea Happens sometimes, we call them caliper worms. Whe... Apr 27 2014, 11:38 PM |
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